What is the active voice of "A lion may be helped even by a little mouse"?

• Passive voice কে Active voice এ রূপান্তরের নিয়ম:
-Passive voice এর object‌ টি  Active Voice এর subject হয় - 
- Tense অনুযায়ী Auxiliary verb -
- মূল verb এর base form -
- Passive voice এর subject টি Active voice এর object হয় -
- তার পূর্বে Preposition (By, with, at, to, in) উঠে যাবে।
Passive Voice: A lion may be helped even by a little mouse.
Active Voice: Even a little mouse may help a lion.

সূত্র: Advanced Learners Communicative English Grammar and Composition (For Class 9-10).